Elastic hinge of the spectacle frame and manufacturing method thereof

ABSTRACT

A kind of resilient hinge for spectacle frames and a method of manufacturing same. Said resilient hinge includes at least an axis as well as a positioning guide, a resilient medium and a stopper, which are fitted over and through the axis in the aforesaid order. The spectacle frame front and temple can be correspondingly closed and opened conveniently and smoothly through the resilience generated by the resilient hinges provided between the spectacle frame front and the temple. The positioning guide is thus designer to maintain the stability of this process. Said method should at least include the following steps: to make the axis into its basic form from a metal sheet; to reduce the diameter size of the end portion of the said axis bearing the basic form and process it into a cylindrical shape with a specified diameter; a hole is provided at the top end of the axis to form a hinge hole. The axis formed will have a high level of brightness without any traces of pressing marks on its surface, the smooth stretching out and bouncing back of the spring is guaranteed. The density of metal molecule is uniform, free from stress concentration. This enhances the hardness, rigidity and stability of the axis. The entire length of the axis can be controlled freely according to structural requirements.

FIELD OF THE INVENTION

This invention relates to a kind of component part for spectacle framesand its manufacturing method, especially a kind of resilient hinge usedfor spectacle frames and a method of manufacturing same.

BACKGROUND OF THE INVENTION

It is well known that spectacles are an indispensable article in ourdaily life. The requirements for spectacles have become higher andhigher as with technological advancements. For this reason,manufacturers and designers of spectacles keep improving each and everycomponent part of spectacles making them more comfortable and convenientto wear. According to the current state of the art, the foldable part ofspectacle frames, i.e. the connecting device connecting the spectacleframe front and the temple mostly is resilient hinge of different sorts.

The resilient hinge used in prior art spectacle frames, as shown in FIG.1, consists of an axis 1′, a spring 3′ and a stopper 4′. At the top endof the axis 1′ there is a male hinge 11′ that corresponds to the femalehinge provided on the spectacle frame (not shown in the figure) andconnects the frame hinge with an extending hook means 12′. The rearportion of the axis 1′ is assembled with spring 3′ and stopper 4′ forfurther sealing assembly with the corresponding receptacles of thespectacle frame.

As shown in FIG. 2 and 3, there is a positioning slot 13′ that runsthrough the hole wall provided on the outward end of the receptacle inthe spectacle frame which is corresponding to the position of the hookstructure 12′. The hook structure 12′ of the axis 1′ is positioned inpositioning slot 13′ and matches said receptacle in both structure andsize. This restricts the up and down movements of the axis of theresilient hinge with respect to the spectacle frame. However, therestriction of movement in only one direction still cannot effectivelyguarantee that the axis will not make any uncertain movements under theaction of uncertain external forces. That is to say, the axis ofresilient hinge will move uncertainly and thus cause damage easily dueto the action of external forces generated during manufacture,transportation or usage.

Current resilient hinges for spectacle frames are shaped by punchforming. This method always leaves pressure marks and rough edges on theoutside surface of the axis, and thus the spring that is assembled overit cannot work smoothly. Moreover, the stability, life and eligibilityrate of the product would all drop due to stress concentration caused bythe punching.

To sum up, spectacle frame resilient hinges manufactured under theexisting technology and the manufacturing method are obviouslyinconvenient and flawed during use. There is therefore a need forimprovement.

SUMMARY OF THE INVENTION

The aim of this invention is to provide a kind of novel, rational andeasy-to-implement positioning guided structured resilient connectinghinge for spectacle frames that uses a, manufacturing method ofdiameter-reducing technique.

Below is a technical proposal for this invention, which is designed toachieve the above purpose:

A resilient hinge for spectacle frames includes an axis and apositioning guide, a resilient medium and a stopper, which are fittedover and through the axis in the aforesaid order. The head end of saidaxis is a male hinge structure that can be connected to a female hingeprovided on the spectacle frame. The middle part of said axis is apillar having a comparatively smaller cross sectional area with at leastone side having a flat surface. The rear portion of said axis is apillar with the smallest cross sectional area. Said positioning guide isprovided with a positioning hole which corresponds to the pillar in themiddle part of the axis. The positioning guide is fitted over the pillarin the middle of the axis through the positioning hole thereof and abutsagainst the male hinge structure of the head end of the axis and thefemale hinge on the spectacle frame. The resilient medium and stopper,in same order, are fitted over and through to the rear pillar of theaxis. The middle and rear pillars of said axis along with thepositioning guide, resilient medium and stopper are all sealinglyassembled in a receptacle in the spectacle frame.

In a preferred embodiment of the present invention, the rear pillar ofthe axis of said resilient hinge of spectacle frame is circular,obtained by diameter-reducing machine through pressing and stretching.

For said resilient hinge of spectacle frame, the cross section of thepillar in the middle of the axis is a polygon.

For said resilient hinge of spectacle frame, the pillar in the middle ofthe axis with a polygonal cross section is a polygon with 3-8 sides.

For said resilient hinge of spectacle frame, the cross sections of themiddle pillar of the axis and the positioning hole of the positioningguide are square or rectangular.

For said resilient hinge of spectacle frame, the cross sections of themiddle pillar of the axis and the positioning hole of the positioningguide have a shape of a kidney or a crisscross or a semi-circle.

For said resilient hinge of spectacle frame, a hook structure extendsoutwardly from the male hinge structure at the head end of the axis. Apositioning slot which runs through the hole wall is provided at theouter end of the receptacle in the spectacle frame at a positioncorresponding to the hook structure. The hook structure on the head endof the axis is positioned in the positioning slot, and matches the saidreceptacle in both structure and size.

There are 2 assembling structures of resilient hinge in spectacleframes:

In a first embodiment, the female hinge is provided on the spectacleframe front; the middle and rear pillars of the axis along with thepositioning guide, resilient medium and stopper are all sealinglyassembled in the receptacle provide in the temple; at least onedepression point or screw or pin is made to the temple in a positioncorresponding to the positioning hole or the positioning neck slotprovided on the positioning guide so that the positioning guide isengaged. The male hinge structure of said axis and be connected movablyto the female hinge on the spectacle frame front.

In a second embodiment, said female hinge is provided on the temple; themiddle and rear pillars of the axis along with the positioning guide,resilient medium and stopper are all sealingly assembled in thereceptacle provided on the spectacle frame front; at least onedepression point or screw or pin is made to the spectacle frame front ina position corresponding to the positioning hole or positioning neckslot provided on the positioning guide so that the positioning guide isengaged. The male hinge structure of said axis can be connected movablyto the female hinge on the temple.

In said resilient hinge of spectacle frame, a positioning hole orpositioning neck slot is provided on the side surface of the positioningguide.

In said resilient hinge of spectacle frame, a plate is provided at theend of the positioning guide close to the edge of the male hingestructure of the axis.

In said resilient hinge of spectacle frame, a hook structure extendsoutwardly from the male hinge structure at the head end of its axis. Apositioning slot running through the hole wall is provided at the outerend of the receptacle of the spectacle frame which corresponds to saidhook structure. A through slot is provided on the plate in a positionwhich corresponds to the hook structure and the positioning slot on thespectacle frame. The hook structure on the head end of said axis ispositioned in the positioning slot and the through slot, and matches thereceptacle in both structure and size.

In said resilient hinge of spectacle frame, there is a guiding chamferon the external rim of the plate.

In said resilient hinge of spectacle frame, the receptacle on thespectacle frame extends outwardly to form an accommodating slotcorresponding to the plate. The plate fits well in the accommodatingslot.

In said resilient hinge of spectacle frame, a stopper is installed andfastened on the outside end portion of the rear pillar of the axis,alternatively, the outside end portion of the rear pillar of the axis ishammered flat to serve as a stopper, so that the resilient medium can bepositioned on the rear pillar of the axis.

With regard to the resilient hinge of the spectacle frame, the resilientmedium is a compression spring.

By adopted the above-mentioned structure, the middle pillar of the axisfits into the positioning hole of the positioning guide. This canrestrict the random movement or rotation of the axis under the action ofrandom and uncertain external forces thus avoiding unnecessary damagebeing made to the structure of the spectacle frame. At the same time, itensures that the axis moves in only one direction which is controlled bythe positioning hole on the positioning guide, i.e. axial movement,under the action of external forces or under the action of resilientforce after external forces have vanished. In other words, the structurealso has a guiding function. Hence, the stability of the specifiedmotion of the hinge can be guaranteed.

To sum up, said resilient hinge features simple and rational structure,good working stability and high quality. The spectacle frame front andtemple can be correspondingly closed and opened conveniently andsmoothly through the resilience generated by the resilient hingesprovided between the spectacle frame front and the temple. The middlepillar of the axis and the positioning guide are thus designed tomaintain the stability of this process. This makes the spectaclescomfortable to wear.

The manufacturing method for a resilient hinge of spectacle framesinvolves at least the following steps:

Primary shaping steps: process from a metal sheet a head end of an axisthat is the male hinge structure, a middle part of a square pillar witha smaller cross-sectional area, and a rear part also of a square pillar.

Diameter reducing steps: the basically formed square pillar at the rearportion of the axis is processed into a circular pillar at a specifieddiameter length by a diameter reducing method of simultaneouscompressing and stretching.

Processing of hinge hole: the head end of the axis is processed to forma hinge hole.

In the manufacturing method of the resilient hinge of spectacle framedescribed in a preferred embodiment of the present invention, theprimary shaping step involves the cutting out of an axis in a primaryshape from a metal sheet.

In the manufacturing method of said resilient hinge of spectacle frame,an axis with a primary shape is cut out from the metal sheet by an NCEDM wire-cut machine in the primary shaping step.

In the manufacturing method of said resilient hinge of spectacle frame,a process through which a common metal sheet is manufactured into onethat meets the specifications required by an NC EDM wire-cut machine isalso included.

In the manufacturing method of said resilient hinge of spectacle frame,a process through which the middle pillar of the axis is shaped is alsoincluded.

In the manufacturing method of said resilient hinge of spectacle frame,the middle pillar of the axis is shaped by compressing or cutting or byother commonly known shaping methods.

In the diameter reducing step of the said manufacturing method of saidresilient hinge of spectacle frame, a diameter-reducing machine is usedto compress or stretch the rear pillar of the axis into a circularpillar with specified diameter.

Said manufacturing method of said resilient hinge of spectacle framealso includes a process to cut off the redundant portion exceeding thedesired length of the rear circular pillar of the axis produced in thediameter-reducing process.

In the hole-forming step of the manufacturing method of said resilienthinge of spectacle frame, drilling machine, punching machine or millingmachine is used to drill out, punch through or mill a hinge hole on themale hinge structure of the head of the axis.

In the manufacturing method of said resilient hinge of spectacle frame,the axis is of metallic material such as titanium, titanium alloy,copper, copper alloy, stainless steel, iron or ferroalloy, etc.

The manufacturing method of said resilient hinge of spectacle frame alsoincludes the process in which the positioning guide, resilient mediumand stopper and fitted over the middle through to the rear pillar in thesame order and well positioned.

By adopting the above-mentioned method, the axis will have a high levelof brightness without any traces of pressing marks on its surface byusing a diameter-reducing machine to manufacture the rear circularpillar of the axis and the smooth stretching out and bouncing back ofthe spring is guaranteed. The density of metal molecule is uniform, freefrom stress concentration. This enhances the hardness, rigidity andstability of the axis.

The entire length of the axis can be controlled to meet structuralrequirements. That is to say, the entire length of the axis which isalso the entire length of the resilient hinge, can be made very short.Thus, the structure on the joints of spectacle frames can be made morecompact and handy. Spectacles produced by this method are morecomfortable and materials can be saved.

In addition, since NC EDM wire-cut machine is used to process axis, itis noteworthy that as compared with commonly used stamping methods,there is hardly any distortion on the axis through processing by NC EDMwire-cut machine. Meanwhile, the position for cutting can be properlyselected so as to save as much materials as possible.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic drawing of a prior art resilient hinge ofspectacle frame.

FIG. 2 shows a prior art resilient hinge of spectacle frame assembled inspectacle frame with the head end of axis exposed.

FIG. 3 shows a prior art resilient hinge of spectacle frame assembled inspectacle frame with the head end of axis exposed and being pulled out.

FIG. 4 is a schematic drawing according to the first embodiment of thepresent invention.

FIG. 5 is an exploded view in which the resilient hinge shown in FIG. 4is being assembled in the spectacle frame.

FIG. 6 shows the perspective view of the positioning guide shown in FIG.4.

FIG. 7 is an exploded view of the second embodiment of the presentinvention.

FIG. 8 is an exploded view of the third embodiment of the presentinvention.

FIG. 9 is an exploded view of the fourth embodiment of the presentinvention.

FIG. 10 is an exploded view of the fifth embodiment of the presentinvention.

FIG. 11 is an exploded view of the sixth embodiment of the presentinvention.

FIG. 12 is an exploded view of the seventh embodiment of the presentinvention.

FIG. 13 is an exploded view of the eighth embodiment of the presentinvention.

FIG. 14 is an exploded view of the ninth embodiment of the presentinvention.

FIG. 15 is an exploded view of the tenth embodiment of the presentinvention.

FIG. 16 is a partial sectional view of one embodiment of said resilienthinge assembled in spectacle frame in the present invention.

FIG. 17 shows an enlarged view of Part A in FIG. 16.

FIG. 18 shows a partial sectional view of another embodiment of saidresilient hinge assembled in spectacle frame in the present invention.

FIG. 19 shows an enlarged view of Part B in FIG. 18.

FIG. 20 is perspective view of the positioning guide with a plate and apositioning neck slot of the present invention.

FIG. 21 is a perspective view of the positioning guide with a plate anda positioning hole of the present invention.

FIG. 22 shows an exploded view of a resilient hinge according to thepresent invention, in which a positioning guide is provided with a platewith guiding chamfer and a corresponding positioning slot is provided inthe spectacle frame.

FIG. 23 shows an exploded view of a resilient hinge according to thepresent invention, in which the head end of an axis is provided with ahook structure and a positioning guide is provided with a plate with acorresponding through slot.

FIG. 24 is a schematic drawing of the axis which is cut and processedinto its fundamental shape through method described in the presentinvention.

FIG. 25 shows a schematic drawing of a rear circular pillar of the axisprocessed by diameter-reducing method according to the presentinvention.

FIG. 26 is a schematic view of a hole being drilled into a resilienthinge in a method according to the present invention.

DESCRIPTION OF THE PREFERRED EMBODIMENT

Below is further explanation on the present invention with reference tothe attached drawing and embodiments:

FIGS. 4-6, 16 and 17 show a kind of resilient hinge of spectacle frame,including an axis 1, a positioning guide 2, a spring 3 and a stopper 4.At the head end of axis 1 is a male hinge structure 11 for connection toa female hinge 51 assembled in temple 5. The middle portion of axis 1 isa square pillar 12 having a comparatively smaller cross-sectional areathan that of male hinge structure 11. The rear portion of axis 1 is acircular pillar 13 having the smallest cross-sectional area. A squarepositioning hole 21 is provided on positioning guide 2, corresponding tosquare pillar 12 in the middle part of axis 1. Positioning guide 2 isfitted over the square pillar 12 of the middle part of axis 1 throughits square positioning hole 21, abuts against the male hinge structure11 of axis 1 as well as female hinge 51. Spring 3 the stopper 4 arefitted over circular pillar 13 of the rear of axis 1 in the aforesaidorder, the head end of spring 3 abuts against positioning guide 2 andthe rear end against stopper 4, and then the rear end of circular pillar13 can be hammered flat for positioning purpose. Square pillar 12 in themiddle of axis 1 and circular pillar 13 at the rear end, along withpositioning guide 2, spring 3 and stopper 4 and sealingly assembled inreceptacle 61 of spectacle frame front 6. A positioning hole 22 isprovided on the outer surface of positioning guide 2, and a depression62 is made or a screw or pin is applied on the outer surface ofspectacle frame front 6 at a position corresponding to positioning hole22 in positioning guide 2, or alternatively, a depression point is madedirectly on the outer surface of spectacle frame front 6 correspondingto positioning hole 22 in order to wedge positioning guide 2.

When temple 5 of spectacle frame front 6 is opened, female hinge 51 andmale hinge 11 rotate relatively with each other. At the same time,female hinge 51 abuts against positioning guide 2 and spectacle framefront 6 pulls axis 1 out of positioning guide 2, i.e. pulls it out fromspectacle frame front 6. After it is opened, axis 1 returns topositioning guide 2 under the resilience action of spring 3. Thestability of movement in the aforesaid operation can be guaranteed dueto the structural matching of square pillar 12 in the middle of axis 1with square hole 21 in positioning guide 2.

The process of closing up temple 5 and spectacle frame front 6 is thesame as the above.

The structural matching of square pillar 12 in the middle of axis 1 withsquare hole 21 in positioning guide 2 functions as follows: not only canit restrict axis 1 of resilient hinge from unwanted radial movements(i.e. in any direction in a range of 360°) with respect to the spectacleframe or to rotate relatively with each other, that is to keep theresilient hinge in agreement with spectacle frame, it also guaranteesthat axis 1 moves only in the direction restricted by square positioninghole 21 under the action of external force or under the resilient forcewhen the external force disappears, that is only in the axial direction.This means that it also plays a guiding role to maintain the stabilityof the specified movement of the hinge.

FIG. 7 is a second embodiment of the present invention. The purpose andeffect of this invention can be achieved if the cross sections of pillar12 a in the middle of axis 1 and positioning hole 21 a in positioningguide 2 all take the shape of pentagon. The principle is the same asmentioned above.

FIG. 8 is a third embodiment of this invention. The purpose and effectof the present invention can be achieved if the cross sections of pillar12 b in the middle of axis 1 and positioning hole 21 b in positioningguide 2 take the shape of crisscross. The principle is the same asmentioned above.

FIG. 9 is a fourth embodiment of this invention. The purpose and effectof the present invention can be achieved if the cross sections of pillar12 c in the middle of axis 1 and the positioning hole 21 c inpositioning guide 2 are of a kidney shape. The principle is the same asmentioned above.

FIG. 10 is a fifth embodiment of this invention. The purpose and effectof the present invention can be achieved if the cross sections of pillar12 d in the middle of the axis 1 and positioning hole 21 d inpositioning guide 2 all take the shape of different crisscrossesconsisting of eight planes and four curved surfaces. The principle isthe same as mentioned above.

FIG. 11 is a sixth embodiment of this present invention. The purpose andeffect of this invention can be achieved if the cross sections of pillar12 e in the middle of axis 1 and positioning hole 21 e in positioningguide 2 bake the shape of semi-circle. The principle is the same as theaforesaid.

FIG. 12-15 are four other embodiment of this present invention. The malehinge structure 11 provided at the head end of said axis 1 extendsoutwardly to form a hook structure 12′. A positioning slot 13′ whichruns through the hole wall is provided at the outer end of receptacle 61of the spectacle frame corresponding to the hook structure 12′. The hookstructure 12′ at the head end of said axis is positioned in thepositioning slot 13′, and they match each other in both structure andsize.

The assembling structure of resilient hinge on spectacle frame can alsobe that as shown in FIG. 18-19. Female hinge 63 can be assembled inspectacle frame front 6. Square pillar 12 in the middle of axis 1,circular pillar 13 in the rear, along with positioning guide 2, spring 3and stopper 4, are sealingly assembled in receptacle 52 provided intemple 5. A depression 53 is made, or a screw or a pin is used on theouter surface of temple 5 corresponding to the positioning hole of thepositioning guide 2, or a depression is made directly on the outersurface of the temple 5 corresponding to the positioning guide 22 inorder to wedge positioning guide 2. The male hinge structure 11 of axis1 is coupled to the female hinge 63 provided on spectacle frame front 6.

As shown in FIG. 20, a positioning neck slot 23 can also be provided onpositioning guide 2. It provides the same function as theabove-mentioned positioning hole 22. One or more depression points aremade or a screw or a pin is used on the spectacle frame corresponding tothe positioning neck slot 23, so as to wedge positioning guide 2.

As shown in FIG. 20-22, a plate 20 is provided at the end of thepositioning guide 2 close to the end of male hinge structure 11 of axis1. That is, positioning guide 2 abuts against male hinge structure 11female hinge through plate 20 the prevent the parts from wearing outduring rotation. A guiding chamfer 24 can also be provided on the rim ofplate 20. Receptacle 61 in spectacle front 6 (or in temple 5) extendsoutwardly to form and accommodating slot 64. Plate 20 is fitted into theaccommodating slot 64. Thus the plate 20 can be placed inside theaccommodating slot 64 in spectacle frame front 6. This does not onlyprovide a more compact and neat structure, but also guarantees itssealingness, preventing contamination by dust.

As shown in FIG. 23, corresponding to the hook structure 12′ axis 1provided at the head end 11 of axis 1, a through slot 25 is provided onplate 20 of positioning guide 2 facing the positioning slot (the figureshows the positioning slot 13′ on spectacle frame front 6) in thespectacle frame, which can be used to contain and be fitted with thehook structure 12′.

In addition, as shown in FIG. 4, positioning guide 2, spring 3 andstopper 4 and fitted over square pillar 12 in the middle and rearcircular pillar 13 of axis 1. Then the end portion of circular pillar 13is hammered flat acting as a stopper for positioning. Here, we can use aseparate stopper, or use the rear end of the circular pillar byhammering it into a flat shape acting as a stopper, or use othercommonly known methods to fix spring 3 and/or stopper 4 to the rearcircular pillar 13.

The manufacturing method of said resilient hinge described in the firstembodiment of the present invention will be introduced below:

By using conventional cutting machines, such as metal sheet cutter, tocut common metal sheet into plate A of designated specifications.

By programming of the NC EDM wire-cut machine, its wire-cutting positioncan be adjusted as shown in FIG. 24, and then a plurality of metalsheets A are placed on the MC EDM wire-cut machine to cut out axis A1 ina primary shape. NC EDM wire-cut machine can cut a plurality of metalsheets at the same time which enhances efficiency. Male hinge structureA11 at the head end of axis 1 and the middle square pillar A12 are bothshaped at the same time, whereas the rear square pillar A13 has yet tobe shaped. Axes processed from NC EDM wire-cut machine are practicallyfree from deformation. Meanwhile, the cutting position can be determinedproperly, so as to save as much materials as possible.

As shown in FIG. 25, we may put the square pillar A13 diameter-reducingmachine to compress and stretch it into a circular pillar B14 with adiameter of 0.6 mm, and then cut off the excess length portion B15,according to the desired length. Thus, rear circular pillar B14 of axisB1 is shaped. The rear circular pillar B14 of the axis, which isprocessed by diameter-reducing machine, will have a high level ofbrightness without any traces of pressing marks on its surface. Thesmooth stretching out and bouncing back of the spring is guaranteed. Thedensity of metal molecules of the rear circular pillar B14 is uniform,free from stress concentration. This enhances the hardness, rigidity andstability of the axis. Moreover, the entire length of the axis can becontrolled freely according to structural requirements. This means thatthe entire length of the axis, can be made as short as needed. Thus,providing a more compact and handy structure at joint portion on thespectacle frame. This produces more comfortable spectacles, and savesmaterials.

As shown in FIG. 26, a hinge hole 111 can be drilled out of the malehinge B11 at the end of axis B1 with a drilling machine. This allows usto obtain axis 1 in its final shape. Moreover, we can also use apunching machine or a milling machine to punch or mill hinge hole 111out of male hinge structure B11.

As shown in FIG. 4, the positioning guide 2, spring 3 and stopper 4 canbe fitted over square pillar 12 and circular pillar 13 of axis 1 in theaforesaid order either manually or by using machines currentlyavailable. Then the rear end of circular pillar 13 is hammered into aflat shape for positioning. Here, we can use a separate stopper, or usethe rear end of the circular pillar which is hammered flat to act as astopper, or adopt other commonly known methods to fix the spring 3and/or stopper 4 to rear pillar 13. In the above-mentioned process, thecutting off the unwanted excess portion of the rear circular pillar canalso cut off at the same time during the hammering flat process bypunching machine or any other machines.

As for the manufacturing method through which the cross section ofpillar 12 in the middle of axis 1 can be shaped into pentagon,crisscross, kidney shape, semi-circle or other irregular shapes, saidmanufacturing method also includes a step through which middle pillar 12punched or pressed or cut into the final shape.

As for the axis with a hook structure 12′ at the head end of the malehinge structure 11, it can be manufactured by adjusting the cuttingposition of wires with NC EDM wire-cut machine.

Based on the technical know-how in the art, the present invention canalso be achieved through other methods that do not deviate from its tentor essential features. Therefore, the implementation plans describedabove are merely illustrative examples and are not in any limited sense.All alterations that fall within the scope of this invention of a scopeequivalent to that of this invention are covered by this invention.

1. A resilient hinge for spectacle frame, including an axis as well as apositioning guide, a resilient medium and a stopper, which are fittedover the axis in the aforesaid order, the head end of said axis isprovided a male hinge structure connected to a female hinge assembled inthe spectacle frame, wherein the middle part of the axis is a pillarhaving a comparatively smaller cross-sectional area with at least oneside being a flat surface, the rear portion of said axis is a pillarwith the smallest cross-sectional area; said positioning guide isprovided with a positioning hole corresponding to the middle pillar ofthe axis, said positioning guide is fitted over the middle pillar of theaxis through the positioning hole and abuts against the male hingestructure of the head end of the axis and the female hinge on thespectacle frame; said resilient medium and stopper are fitted over therear pillar of the axis in the aforesaid order; the middle and rearpillars of said axis together with the positioning guide, resilientmedium and stopper are all sealingly assembled in an accommodating ofthe spectacle frame.
 2. The resilient hinge of the spectacle frameaccording to claim 1, wherein the rear pillar of said axis iscylindrical, which is manufactured through pressing and stretching bydiameter-reducing machine.
 3. The resilient hinge of the spectacle frameaccording to claim 1, wherein the middle pillar of said axis is a pillarwith a polygonal cross section.
 4. The resilient hinge of the spectacleframe according to claim 3, wherein the middle pillar of said axis is apillar with a 8-sided polygonal cross section.
 5. The resilient hinge ofthe spectacle frame according to claim 4, wherein the cross sections ofthe middle pillar of said axis and the positioning hole in positioningguide are square of rectangular.
 6. The resilient hinge of the spectacleframe according to claim 1, wherein the cross sections of the middlepillar of said axis and the positioning hole in positioning guide are inthe shape of kidney or crisscross or semi-circle.
 7. The resilient hingeof the spectacle frame according to claim 1, wherein on a lateral sideof the outer surface of said positioning guide is provided with apositioning hole or positioning neck slot.
 8. The resilient hinge of thespectacle frame according to claim 7, wherein the female hinge isprovided on the spectacle frame front; the middle and rear pillars ofthe axis together with the positioning guide, resilient medium andstopper are sealingly assembled in the accommodating receptacle ontemple; and at least one depression or screw or pin is made or used in aplace on the temple corresponding to the positioning hole or thepositioning neck slot in the positioning guide and as a result thepositioning guide is wedged; the male hinge structure of said axis isconnected movably to the female hinge assembled in the spectacle framefront.
 9. The resilient hinge of the spectacle frame according to claim7, wherein said female hinge is provided on the temple; the middle andrear pillars of said axis together with the positioning guide, resilientmedium and stopper are sealingly assembled in the accommodatingreceptacle in the spectacle frame front; and at least one depression orscrew or pin is made or used in a place on the spectacle frame frontcorresponding to the positioning hole or the positioning neck slot inthe positioning guide and as a result the positioning guide is wedged;the male hinge structure of said axis is connected movably to the femalehinge assembled in the temple.
 10. The resilient hinge of the spectacleframe according to claim 1, wherein the male hinge structure located atthe head end of said axis extends outwardly to form a hook structure; apositioning slot that runs through the hole wall is provided in theouter end of accommodating receptacle in the spectacle framecorresponding to where the hook structure is; the hook structure at thehead end of the axis is positioned in the positioning slot with theirstructural sizes matching with each other.
 11. The resilient hinge ofthe spectacle frame according to claim 1, wherein at the end of thepositioning guide close to the male hinge structure of the axis is alsoprovided with a plate.
 12. The resilient hinge of the spectacle frameaccording to claim 11, wherein the male hinge structure located at thehead end of said axis extends outwardly to form a hook structure; apositioning slot that runs through the hole wall is provided at theoutside end of the receptacle in the spectacle frame corresponding towhere the hook structure is, a through slot is provided on the platecorresponding to the hook structure and the positioning slot in thespectacle frame, the hook structure at the head end of the axis ispositioned in the positioning slot and the through slot with theirstructural sizes matching with each other.
 13. The resilient hinge ofthe spectacle frame according to claim 11, wherein the rim of the plateis provided with a guiding chamfer.
 14. The resilient hinge of thespectacle frame according to claim 11, wherein the accommodatingreceptacle in the spectacle frame extends outwardly with anaccommodating slot corresponding to the plate, said plate suitably fitsin the accommodating slot.
 15. The resilient hinge of the spectacleframe according to claim 1, wherein a stopper is securely assembled inthe outer end portion of rear pillar of said axis or the outer endportion of the rear pillar of the axis is directly hammered into a flatshape as a stopper, so that the resilient medium is positioned on therear pillar of the axis.
 16. The resilient hinge of the spectacle frameaccording to claim 1, wherein said resilient medium is a compressionspring.
 17. A manufacturing method for a resilient hinge of spectacleframe, which comprises at least the following steps: primary shapingstep: the axis having a primary shape manufactured from a metal sheetthat the head end of the axis is a male hinge structure, the middle partis a square pillar with a comparatively smaller cross-sectional area andthe rear part is a square pillar; diameter-reducing: processing the rearsquare pillar of the axis having the primary shape into a circularpillar with specified diameter value by compressing and stretchingsimultaneously; processing a hinge hole: making a hole at the head endof the axis.
 18. The manufacturing method of resilient hinge ofspectacle frame according to claim 17, wherein the axis having a primaryshape is cut out from a metal sheet in the primary shaping step.
 19. Themanufacturing method of resilient hinge of spectacle frame according toclaim 18, wherein the axis having a primary shape is cut out from ametal sheet with an NC EDM wire-cut machine in the primary shaping step.20. The manufacturing method of resilient hinge of spectacle frameaccording to claim 19, wherein it also includes a step through which anordinary metal sheet is manufactured into one that meets thespecifications required by an NC EDM wire-cut machine.
 21. Themanufacturing method of resilient hinge of spectacle frame according toclaim 17, wherein it also includes a step of shaping the middle pillarof the axis.
 22. The manufacturing method of resilient hinge ofspectacle frame according to claim 21, wherein the middle pillar of saidaxis is shaped by pressing or cutting or by other commonly known shapingmethod.
 23. The manufacturing method of resilient hinge of spectacleframe according to claim 17, wherein in the step of thediameter-reducing, the rear portion of the axis having a primary shapeis compressed and stretched into a circular pillar with a specifieddiameter by using a diameter-reducing machine.
 24. The manufacturingmethod of resilient hinge of spectacle frame according to claim 17,wherein said method includes a step in which the unwanted excess portionof the rear circular pillar of the axis that was produced by thediameter-reducing process can be cut out.
 25. The manufacturing methodof resilient hinge of spectacle frame according to claim 17, wherein ahinge hole in the male hinge structure of the head of the axis isdrilled out, punched or milled by a drilling machine, punching machineor milling machine in the hinge hole processing step.
 26. Themanufacturing method of resilient hinge of spectacle frame according toclaim 17, wherein the axis is manufactured from materials like titanium,titanium alloy, copper, copper alloy, stainless steel, or other metallicmaterials like iron of ferroalloy, etc.
 27. The manufacturing method ofresilient hinge of spectacle frame according to claim 17, wherein italso includes a step of fitting the positioning guide, resilient mediumand stopper over the middle pillar through to the rear pillar in sameorder and fixing their positions.